Omron D4N-1A2H Limit Switch
Omron D4N-1A2H uses an adjustable form-lock roller lever with a metal lever and rubber roller, allowing the actuator position to be set for the required mechanical contact point. Its 1NC/1NO contacts use a slow-action mechanism and a single-conduit connection. Operating speed ranges from 1 to 500 mm/s, with IP67 protection and 25 mΩ maximum contact resistance. The D4N-1A2H belongs to the D4N Series within the adjustable roller lever switch range from Omron limit switch products. The adjustable form-lock actuator is its main model-specific feature.
| Brand | Omron |
| Product | Limit Switch |
| Model Number | D4N-1A2H |
Omron D4N-1A2H Limit Switch – Technical Specifications
| Specification | Value |
|---|---|
| Contact Form | 1NC/1NO |
| Shock Resistance | Destruction 1,000 m/s2 min. Malfunction 300 m/s2 min. |
| Degree Of Protection | IP67 |
| Insulation Resistance | 100 MΩ min. |
| Actuator | Adjustable roller lever, form lock (metal lever, rubber roller) |
| Vibration Resistance | Malfunction 10 to 55 Hz, 0.75 mm single amplitude |
| Operating Mechanism | Slow-action |
| Conduit Size Conduit Openings | 1-conduit |
| Operating Speed | 1 to 500 mm/s |
| Operating Frequency | 30 operations/minute max. |
| Contact Resistance | 25 mΩ max. |
| Rated Insulation Voltage Ui | 300 V |
| Rated Frequency | 50/60 Hz |
| Ambient Operating Temperature | −30 to 70°C (with no icing) |
| Ambient Operating Humidity | 95% max |
| Weight | Approx. 82 g (D4N-1120); Approx. 99 g (D4N-6120) |
The Omron D4N-1A2H Limit Switch uses an adjustable form-lock roller lever built with a metal lever and rubber roller. The adjustable actuator is the main mechanical feature, allowing the lever position to be set instead of relying on a fixed roller geometry. A slow-action mechanism operates 1NC/1NO contacts, while the single-conduit design supports wiring into the switch. Operating speed ranges from 1 to 500 mm/s and switching frequency is specified at 30 operations per minute maximum. IP67 protection, 100 MΩ minimum insulation resistance, and 25 mΩ maximum contact resistance are listed.
The D4N-1A2H operates from -30 to 70°C with relative humidity up to 95%. Its rated insulation voltage is 300 V at 50/60 Hz. Malfunction vibration resistance covers 10 to 55 Hz at 0.75 mm single amplitude, while destructive and malfunction shock resistance are at least 1,000 and 300 m/s² respectively. The form-lock adjustable lever and rubber roller make this configuration distinct from fixed roller-lever models. For another 1NC/1NO D4N roller-lever configuration using snap action, see the D4N-2122 model.
